/*
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 * and open the template in the editor.
 */
package demo1012;

import java.awt.Point;
import javax.swing.JOptionPane;

/**
 *
 * @author Administrator
 */
public class ExceptionDemo5 {

    public static void main(String args[]) {
      String s=null;
      int a;
      System.out.println(s.length());
      Student st=null;
      st.setId("123");
      
      

    }
}
